Proton nuclear magnetic resonance ((1)H NMR) spectra of leaves from 50 plant species were obtained at a spectrometer frequency of 470 MHz. Water present in leaf samples gives rise to characteristic spectral patterns. Most species show only one broad (1)H NMR peak; however, the leaves of some plants display complex, orientation-dependent spectra in which a… (More)

We consider a single-input-single output systems whose internal dynamics are described by the heat equation on some domain Ω ⊂ R d with sufficiently smooth boundary ∂ Ω. The input is formed by the Neumann boundary values; the output consists of the integral over the Dirichlet boundary values. We show that the transfer function admits some partial fraction… (More)